VIPERCoalescer.hh

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/*
 * Copyright (c) 2013-2015 Advanced Micro Devices, Inc.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
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 * this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
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 * software without specific prior written permission.
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#ifndef __MEM_RUBY_SYSTEM_VIPERCOALESCER_HH__
#define __MEM_RUBY_SYSTEM_VIPERCOALESCER_HH__
 
#include <iostream>
 
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/protocol/PrefetchBit.hh"
#include "mem/ruby/protocol/RubyAccessMode.hh"
#include "mem/ruby/protocol/RubyRequestType.hh"
#include "mem/ruby/system/GPUCoalescer.hh"
#include "mem/ruby/system/RubyPort.hh"
 
namespace gem5
{
 
struct VIPERCoalescerParams;
 
namespace ruby
{
 
class DataBlock;
class CacheMsg;
struct MachineID;
class CacheMemory;
 
class VIPERCoalescer : public GPUCoalescer
{
  public:
    typedef VIPERCoalescerParams Params;
    VIPERCoalescer(const Params &);
    ~VIPERCoalescer();
    void writeCompleteCallback(Addr address, uint64_t instSeqNum);
    void invTCPCallback(Addr address);
    RequestStatus makeRequest(PacketPtr pkt) override;
    void issueRequest(CoalescedRequest* crequest) override;
 
  private:
    void invTCP();
 
    // make write-complete response packets from original write request packets
    void makeWriteCompletePkts(CoalescedRequest* crequest);
 
    // current cache invalidation packet
    // nullptr if there is no active cache invalidation request
    PacketPtr m_cache_inv_pkt;
 
    // number of remaining cache lines to be invalidated in TCP
    int m_num_pending_invs;
 
    // a map of instruction sequence number and corresponding pending
    // write-complete response packets. Each write-complete response
    // corresponds to a pending store request that is waiting for
    // writeCompleteCallback. We may have multiple pending store requests per
    // wavefront at a time. Each time writeCompleteCallback is called, an entry
    // with a corresponding seqNum is popped off from map and returned to
    // compute unit.
    std::unordered_map<uint64_t, std::vector<PacketPtr>> m_writeCompletePktMap;
};
 
} // namespace ruby
} // namespace gem5
 
#endif //__MEM_RUBY_SYSTEM_VIPERCOALESCER_HH__